JPS6312619B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker, and is intended to improve the degree of sealing between an inner lid and a pot.

Structure of conventional examples and their problems According to various data regarding rice cooking, it is said that the higher the rate of gelatinization of starch, the main component of rice, the sweeter it is, the better the digestibility and absorption, and the better the rice is cooked. This gelatinization is promoted by water and heat, and from a thermal perspective, it is said to progress rapidly at around 100°C and further accelerate when the temperature exceeds 100°C. However
In order to raise the temperature above 100°C, the boiling point needs to be above 100°C, so it is necessary to increase the internal pressure inside the pot. Conventionally, a flexible rubber packing was interposed between the inner lid periphery and the pot periphery to eliminate the gap between the two, but the rubber packing has a directionality and users may accidentally attach it in the wrong direction. There was a danger, and in this case, no increase in internal pressure could be expected, and the original performance could not be demonstrated. In addition, in order to improve heat retention performance and prevent steam leakage from the bottom surface of the outer lid during cooking, a silicone rubber annular tongue piece with flexibility diagonally downward from the outer edge of the heat sink was used between the pot and the heat sink. Equipped with packing. However, this structure was difficult for the user to clean due to the fact that the outer cover was attached.

Purpose of the Invention The present invention has been made to solve the above-mentioned conventional problems, and aims to provide a rice cooker that has an inner lid with good sealing properties and a packing that is easy to handle, in order to cook rice well. It is something.

Structure of the Invention In order to achieve the above object, the present invention provides a cylindrical pot with a bottom, an outer cover that covers the upper opening of the pot, an inner cover provided below the outer cover, and a peripheral edge of the inner cover. a packing attached to the inner lid, the peripheral edge of the inner lid is curled, and the packing includes a curled recess that holds the curled peripheral edge of the inner lid, and a curled recess vertically symmetrically inclined from the curled recess. The upper annular tongue part is in contact with the back surface of the outer lid, and the lower annular tongue part is in contact with the upper flange part of the pot. The packing makes it easy to attach to the inner lid.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a main body of the device, which is composed of a cylindrical outer shell 2, a protective frame 3, a heat insulating material 4 interposed between the two, and the like. Reference numeral 5 denotes a pot serving as a rice cooking container, which is provided with an arbitrary gap from the opening of the protective frame 3 and is detachable. On the other hand, the outer lid 6 and the handle 7 are integrally molded,
A heat radiating plate 10 with a heat retaining heater 9 is attached to the lower surface via a lid insulating material 8, and a steam cylinder 11 is further attached to the heat radiating plate 10, passing through a hole in the outer lid 6. Further, the outer cover 6 is pivotally supported on the main body 1 by a shaft 12,
The hook lever 13 on the other side is engaged with the main body 1.
14 is an inner lid made of an aluminum plate, and a packing 15 made of silicone rubber for sealing the pot 5 around the periphery;
Furthermore, it is equipped with a valve seat 16 made of silicone rubber for cooking rice at a constant pressure, and a weight-type valve 17 that can be freely attached to and detached from the valve seat 16. Furthermore, a bush 18 made of silicone rubber is provided at the center of the inner lid, and is configured to be detachable from a pin 19 screwed onto the heat sink plate 10.

Next, the structure of the peripheral portion of the inner lid 14 and the packing 15 will be explained based on FIG. 2.

The packing 15 has a curled concave portion 20 on the inner lid 14.
It has an upper annular tongue portion 21 and a lower annular tongue portion 22 which are vertically symmetrical and inclined vertically from an arbitrary position of the curled recess 20. When the outer lid 6 is closed, the upper annular tongue portion 21 is configured to have a deflection a between it and the heat sink 10, and the lower annular tongue portion 22 is configured to have a deflection b between it and the pot 5.

In the above configuration, during rice cooking, the internal pressure inside the pot 5 due to heating is sealed with the pot 15 by the lower annular tongue portion 22 of the packing 15, and the pressure is controlled by the valve seat 16 and valve 17 mounted on the inner lid 14. Further, the steam discharged from the valve 17 is discharged to the outside from the steam cylinder 11 because the heat sink 10 is sealed by the upper annular tongue portion 21 of the packing 15. Therefore, the conventional packing 23 is no longer necessary because it can exhibit the same performance as the conventional packing 23 shown in FIG. The problems of difficulty and sanitary maintenance are solved. In addition, since the packing 15 can be attached to the outer circumference of the inner lid, it can be operated integrally with the inner lid when opening and closing the lid, and it is easy to attach and remove, so it is always maintained hygienically. can be prevented,
The original product function can always be demonstrated.

Effects of the Invention As is clear from the above explanation, according to the present invention, the packing provided on the periphery of the inner lid has its upper and lower annular tongue portions in contact with the back surface of the outer lid and the upper flange of the pot, so that the packing and the inner lid are in contact with each other. The lid is sealed, and the steam discharged through the inner lid is sealed between the inner and outer lids and is discharged from the steam cylinder installed in the outer lid, so it is kept sanitary and the packing is vertically symmetrical. Its value is great because it prevents misuse.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the top of a jar rice cooker showing one embodiment of the present invention, Figure 2 is a sectional view of the same essential parts, and Figure 3 is a sectional view of a conventional jar rice cooker corresponding to Figure 2. be. 5... Pot, 6... Outer lid, 10... Heat sink, 14
. . . Inner lid, 14a . . . Curling portion, 15 . . . Packing, 20 .

Claims (1)

[Claims] 1. A cylindrical pot with a bottom, an outer lid that covers the top opening of the pot, an inner lid provided below the outer lid, and a packing attached to the periphery of the inner lid,
The peripheral edge of the inner lid is curled, and the packing includes a curled recess that holds the curled peripheral edge of the inner lid, and an annular tongue extending vertically symmetrically from the curled recess at an angle. The rice cooker is formed by integrally forming the upper annular tongue part with the back surface of the outer lid, and the lower annular tongue part with the upper flange part of the pot.